public async Task <ActionResult> CreateGrade(GradeCreateViewModel model)
{
if (ModelState.IsValid)
{
if (model.GradeNumber == 0)
{
ModelState.AddModelError("", "GradeNumber不能为0");
}
else
{
var grade = await InstitutionManager.FindGradeByGradeNumberAsync(model.GradeNumber);
if (grade == null)
{
await InstitutionManager.AddGradeAsync(model.GradeNumber);
return(RedirectToAction("AllGrade"));
}
else
{
ModelState.AddModelError("", "已有相同名称");
}
}
}
return(View(model));
}